I agree about pressure. ESPNWisconsin or someone referred to Pro Football Focus and said that the Packers blitzed on 10 of 35 Brees drop backs. He had a perfect passer rating on the throws without a blitz. I am a little dubious about that as I THINK Matthews caught him on a base pressure play (though there was no throw obviously).
But it goes without saying that if you go high pressure, you are going to get strafed by well timed runs with your pass rush unit out there. That is not really a threat with the Colts unless its Luck himself.
And that brings me around to the critical failure of this coach and this GM. They don't seem able to collect and develop the talent to get pass rush out of their base personnel. And as wist has pointed out, it becomes a tell. Now, if you can leverage it into favorable down and distance, then it doesn't matter. But as Capers said in the JSO writeup, without good tackling, it was too often 3rd and 2, not 3rd and 9.